add apk/alpine support (#98)

imgbom/pkg/metadata.go

@@ -41,3 +41,21 @@ type JavaMetadata struct {
 	PomProperties *PomProperties `mapstructure:"PomProperties"`
 	Parent        *Package
 }
+
+// source: https://wiki.alpinelinux.org/wiki/Apk_spec
+type ApkMetadata struct {
+	Package          string `mapstructure:"P"`
+	OriginPackage    string `mapstructure:"o"`
+	Maintainer       string `mapstructure:"m"`
+	Version          string `mapstructure:"V"`
+	License          string `mapstructure:"L"`
+	Architecture     string `mapstructure:"A"`
+	URL              string `mapstructure:"U"`
+	Description      string `mapstructure:"T"`
+	Size             int    `mapstructure:"S"`
+	InstalledSize    int    `mapstructure:"I"`
+	PullDependencies string `mapstructure:"D"`
+	PullChecksum     string `mapstructure:"C"`
+	GitCommitOfAport string `mapstructure:"c"`
+	Files            []string
+}

imgbom/pkg/type.go

@@ -2,7 +2,7 @@ package pkg
 
 const (
 	UnknownPkg Type = iota
-	//ApkPkg
+	ApkPkg
 	BundlerPkg
 	DebPkg
 	EggPkg
@@ -20,7 +20,7 @@ type Type uint
 
 var typeStr = []string{
 	"UnknownPackage",
-	//"apk",
+	"apk",
 	"bundle",
 	"deb",
 	"egg",
@@ -35,7 +35,7 @@ var typeStr = []string{
 }
 
 var AllPkgs = []Type{
-	//ApkPkg,
+	ApkPkg,
 	BundlerPkg,
 	DebPkg,
 	EggPkg,